No one's quite sure what's so special about this particular spot, but some scientists think this trick works by interrupting the pain signals your nausea is sending to the brain.

没有人十分确定这个特定位置有什么特别之处，但一些科学家认为这个技巧可以通过中断恶心向大脑发送的疼痛信号来发挥作用。